Vapor pressure barriers for lead acid batteries for improved water loss performance, separators, systems, and methods of manufacture and use thereof

Patent metadata

Field	Value
Publication number	US-2021020883-A1
Application number	US-202017063735-A
Country	US
Kind code	A1
Filing date	Oct 6, 2020
Priority date	Feb 26, 2015
Publication date	Jan 21, 2021
Grant date	—

Abstract

New or improved lead acid batteries with vapor pressure barriers and/or improved battery separators, as well as systems, vehicles, and/or methods of manufacture and/or use thereof are disclosed herein. In at least select embodiments, the instant disclosure provides new or improved lead acid batteries with a vapor pressure barrier. In at least select embodiments, the instant disclosure provides new or improved lead acid battery vapor pressure barriers along with new or improved battery separators, and/or methods of manufacture and/or use thereof. In at least select embodiments, the instant disclosure provides a new or improved lead acid battery with a vapor pressure barrier that reduces the water loss from the battery. In at least select embodiments, a method of reducing the water loss of a lead acid battery may include providing a vapor pressure barrier, such as a layer of oil, inside the lead acid battery along with an improved battery separator.

First claim

1 - 15 . (canceled)

16 . A battery separator comprising an oil layer on a porous membrane or mat, wherein the oil layer comprises one or more selected from the group consisting of naturally derived oils and synthetically derived oils.

17 . The battery separator of claim 16 , wherein the oil layer comprises a paraffinic oil.

18 . The battery separator of claim 16 , wherein the oil layer comprises a napthenic oil.

19 . The battery separator of claim 16 , wherein the oil layer comprises a polyalphaolefin (PAO) oil.

20 . The battery separator of claim 16 , wherein the oil layer comprises an oil with polyester functionalities.

21 . The battery separator of claim 16 , wherein the oil layer comprises a mineral oil.

22 . The battery separator of claim 21 , wherein the oil layer comprises white mineral oil.

23 . The battery separator of claim 16 , wherein the oily layer comprises two or more naturally derived oils, two or more synthetically derived oils, or a mixture of at least one naturally derived oil and at least one synthetically derived oil.

24 . The battery separator of claim 16 , wherein the oil layer further comprises one or more selected from the group consisting of zinc sulfate, low HLB surfactants, and other materials that reduce water loss.

25 . The battery separator of claim 24 , wherein the oil layer further comprises zinc sulfate.

26 . The battery separator of claim 24 , wherein the oil layer further comprises one or more low HLB surfactants.

27 . The battery separator of claim 24 , wherein the oil layer further comprises one or more other materials that reduce water loss.

28 . The battery separator of claim 16 , wherein the oil layer is provided on a porous membrane.

29 . The battery separator of claim 28 , wherein the porous membrane is microporous.

30 . The battery separator of claim 28 , wherein the porous membrane is a filled or unfilled polyethylene porous membrane.

31 . The battery separator of claim 16 , wherein the oil layer is provided on a porous mat.

32 . The battery separator of claim 31 , wherein the porous mat is microporous.

33 . The battery separator of claim 31 , wherein the porous mat is a filled or unfilled polyethylene porous mat.

34 . A lead acid battery comprising the battery separator of claim 16 , wherein the lead acid battery exhibits low or reduced water loss.

35 . A lead acid battery comprising the battery separator of claim 24 , wherein the lead acid battery exhibits low or reduced water loss.

Assignees

• Daramic Llc

Inventors

• Roberts Margaret R
• Chambers Jeffrey K
• Perry James
• Whear J Kevin

Classifications

• Y02T90/40

  Application of hydrogen technology to transportation, e.g. using fuel cells · CPC title

• H01M10/12 Primary

  Construction or manufacture · CPC title

• B60L50/72

  Constructional details of fuel cells specially adapted for electric vehicles · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title